Energy Performance Assessment

Energy Modelling

Whether to help with sustainable design, demonstrate compliance with regulations, improve energy performance or generate an Energy Performance Certificate, building energy modelling is an essential service for designers, owners and operators alike.

Simplified Building Energy Modelling (SBEM) is the approved national calculation methodology used to calculate the energy efficiency of commercial properties.

SBEM calculates the monthly energy use and carbon emissions of a building based on its size, orientation, geometry, construction and systems.

Our in-house accredited energy assessors can help clients achieve Part L compliance with design stage calculations, draft Energy Performance Certificates (EPCs), as-built calculations and final EPCs for Building Control sign-off and handover.

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Improve Your EPC Rating

Ensure that your commercial property still complies with legislation, performs better and remains attractive to your tenants by improving your buildings’ Energy Performance (EPC) ratings.

Lower energy bills – We can model your property’s existing and potential energy consumption and suggest cost-effective efficiency improvements such as improved insulation, LED lighting and lighting controls or Solar PV.

Minimum Energy Efficiency Standards (MEES) for commercial properties mean that it is currently unlawful for landlords to grant a new tenancy for commercial property with an EPC rating of ‘F’ or worse. By 1 April 2030 all  commercial rented buildings must have improved the building to a minimum EPC B.

If you have one or a portfolio of commercial properties, ask NSI Projects about how we can help.


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Energy Strategy

Our experts can advise on many aspects of building energy sustainability, from design and compliance through to demand reduction and renewable energy solutions. We work with clients to create practical and pragmatic strategies to reduce emissions and save whole-life costs.

Planning requirements – Local, regional and national planning policies are placing an ever-increasing emphasis on the need to conserve energy and reduce carbon emissions. We can create energy strategies for new developments based on detailed SBEM modelling.

Pathways to net zero – Advice on suitable and cost-effective solutions to reducing carbon emissions and lowering energy bills through LZC renewable energy technologies.

Help to interpret and apply changing environmental and sustainability legislation.

ESG concept of environmental, Green ethical business preserving

Case studies

Telecom House

We carried-out energy modelling of the property to ascertain the implications of making the real estate more sustainable, to future proof it from an environmental performance perspective and to make the building more attractive to potential tenants.

Port of London Authority

We were asked to model the energy usage and CO2 emissions of London River House and the impact of refurbishment measures (planned and potential) on building energy performance. Recommendations were made to deliver a refurbished building that used less energy (Be Lean), was supplied energy more efficiently (Be Clean) and which took advantage of renewable energy (Be Green).